Tool for cutting and grooving flat chain-link blanks.



PATENTED MAR. 26, 1907 W. SOHENK. TOOL FOR CUTTING AND GROOVING FLAT CHAIN LINK BLANKS.

APPLICATION FILED NOV.17.1906.

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WW y 9 2 sey City, Hudson'county, State of ew Jer .sey, have 1nvented new and useful Improve UNITED STATES, PATENT OFFICE.

WILLIAM SOHENK, or JERsEY OITY,1TEW JERSEY. TOOL FOR CUTTING AND eaoovme FLAT CHAIN-LINV'K BLA NKSr To all whom, it. may concern:

Be it known that I, WILLIAM SOHENK, a citlzen of the United States, residin "at Jerments in Tools for Cutting and Grooving Flat Cham-Link Blanks, of which the following is a specification.

his invention relates to a a flat chain-link blank from for simultaneouslygrooving the link thus tool for cutting severed, the grooved section thus formed constituting the female member of the hinge-.

' oint by-which adjoining links are subsequently connected.

The tool is articularly adapted for the manufacture jewelry-chains, jointed bracelets, and similar articles and permits the links for said articles to be formed in a quick and accurate manner without the employment of skilled labor.

In the accompanying drawing, 1

' a plan of my improved tool, showm it secured to a lathe; 2, an end viewt ere of; 111g. 31, a plan of the work-holding plate with t e c 5' 5 Fig. 3; Fi 6 a lon itudinal-sectinn thrdugh g g 11 a perspective view of themetal bar from 2 which the blank is cut.

The bar 12 to be subdivided into links is rovided at each side witha bead 13 and 14. he. tool which-forms the subject of this in-- vention cuts or slices the fiat link-blanks 15 from said bar and simultaneously forms a groove 16 in the bead 14 of said link. After the link has thus been formed bead 13 is reduced by a difierefiftool to forrna knuckle 9. In assemblin the of a chain t e knuckle 17 of one ink is introduced into the groove 16 of the adjoining link and connected thereto by a pivot 18, as shown in Fig. 10, which illustrates the chain complete; The tool comprises, essentially, a spindle which carries the cuttin' and grooving devices and a coacting work-holder which presents the bar to be subdivided to such devices. The spindlef19 is adapted to receive continuous rotatory movement by means. of

Specification of Letters Patent. Application filed November 17,1906. Serial No. 343,808. I

a metal bar and ampmg-lever omitted; Fig. 4,- a rear' view thereof; Fig. 5, a cross-section on line" the sawspindle; Fig.7, a perspec tive view of the lmk-bla'nk formed by the- Patented March 26, 1907.

ported, motion bein transmitted to the spindle from disk 22 of t e head-stock by arm 23. Upon spindle 19 are mounted, first, a disk 24,- that constitutes a gage or sto ;-second,

a circular grdove-cutter 25, and, t "rd, a circular saw 26. The distance between the inner faces ofarts 24 26 dorresponds to the thickness of t e blank to be v while the thicknessof cutter 25 corresponds in th; width of groove16'to be formed in said sliced off bar 12., v

Cutter 25 is spaced from parts 24 and 26 .by washers 2728, the thickness of the washers corres onding to that'of the lugs 29, that flank or d efine groove 16. Cutter 25 should be of less diameter than saw 26, which in turn is of less diameter than gage 24. For

are then successively mounted upon stem 30, saw 26 beingg engaged at its outer face by a tubular sleeve'32, surrounding stem 30. This sleeve is locked in position by a nut v33 screwed upon the threaded andneduced end- 34 of the stem. Bythe nieansdescribed the cutter 25, as well as the saw 26, may be read-.

'ily removed and'washers oi" differentthick- .assemblin the parts spindle 19 is provided ness may be substituted for washers 27 28,

and dimensions of the blanks to be formed. a The slide-rest 35, by which. bar'12 is presented to the cutters 2526, is movable-to ward. and away from s indle'19 by means of holdin plate 37, that projects rearwardly so as to adjust;the:..device to various styles handle 36. Fast on s ide-rest 35 is a Workbeyon the same-and has anupper rear recess 38" for seating bar 12. Plate 37.1isfur- Slots 39 40 are separated by an intervening partition or finger 41, having a slot 42, adapted to accommodate groove-cutter 25. An

ther'providedwith a slot 39 opposite disk 24 andwith a second 'slot 40 opposite saw-26.'

IOO

upper rearreces s 43 on finger 41, alined with recess 38, forms a seat for the blank when severed. "The-size of disk 24 is such that when it contacts with the base of slot 39 cutter'25, has penetrated the blank to the depth desired, so that in this way the diameter of the disk determines the depth of groove 16.,

Plate 37 forms -the fixed member of a clamp, the movable member of which is formed by a dog or hand-lever 44,fulcrumed at 45 to lugs 46 of plate 37 and influenced by a spring 47. Dog 44 is provided a pair over the unsevered end of bar 12 to hold said leased to clamp the bar in position.

' said groove-cutter, substantially as specified.

'finger 41 to hold thesevered blank to its fromplate 37, so that it may be replaced As shown, it is held to plate fously'sever the blank fromthe bar.

limits the advance of the slide-rest.

vmounted'on t e spindle at the other side of the groove-cutter, and washers intermediate the groove-cutter and the gage and saw, subof jaws48 49, separated by a slot 50 adapted to accommodate saw 26. Jaw 48 extends bar to its seat 38, while. jaw 49 extends overseat 43.

Finger 41 is preferably made removable when necessary. 37 by engaging a transverse gnopve 51 of the latter. i

The operationof the device will be readily understood. Dog 44 is swung up, and bar 12 is so seated uporrplate 37 that its end abuts against disk 21, after which thedog isTre he slide-restbeing advanced, cutter 25 will now form groove 16,'while saw 26 will simultane- In this way by a single operation the blank is out and groovedfuniformity of the work being insured by disk 24, which, as already stated, When the blank has been formed as described, the slide-rest is retracted and dog 44 is swung up, so that the blank is discharged.

I claim- 1.. In a tool of the character described, a spindle,. a groove-cutter mounted thereon, a spaced saw mounted on the. spindle at one side of the groove-cutter, and a spaced gage mounted on the spindle at the other side of 2. In a tool of the character described, a spindle, a groove-cutter mounted thereon, a spaced'saw mounted on the spindle at one side of the roove-cutter, a spaced gage stantially as specified,

3. In a tool of the character described, a

spindle, a groove-cutter mounted thereon, a spaced saw mounted on the spindle at one side of the groove-cutter, and a spaced age mounted on the spindle at the other side of said groovecutter, the diameter of the saw being greater than that of the groove-cutter, substantially as specified.

4. In a tool of the character described, a spindle, a groove-cutter mounted thereon,, a spaced saw mounted on the spindle at one side of the groove-cutter, and a spaced age mounted 'on the spindle at the other side of said groove-cutter, the diameter ofthe saw being greater than that of the groove-cutter, and the diameter of the gage being greater than that of the saw, combined with'a workholder having a slotted rear edge adapted to contact with the gage, substantially as specified.

5. In a tool of the character described, a, spindle, a groove-cutter mounted thereon, a

spaced saw mounted on the spindle at one s1de of the groove-cutter, and a spaced gage mounted on the spindle at the other side of saidgroove-cutter, the diameter of the saw 

